Acura ILX (2021 year). Manual in english - page 28

446

uu

When Driving

u

Tire Pressure Monitoring System (TPMS)

Driving

Tire Pressure Monitoring System (TPMS)

Monitors the tire pressure while you are 
driving. If your vehicle's tire pressure becomes 
significantly low, the low tire pressure/TPMS 
indicator comes on and a message appears on 
the multi-information display.

1

Tire Pressure Monitoring System (TPMS)

Conditions such as low ambient temperature and 
altitude change directly affect tire pressure and can 
trigger the low tire pressure/TPMS indicator to come 
on.

2

If the Low Tire Pressure/TPMS Indicator 
Comes On or Blinks

 P. 595

Tire pressure checked and inflated in:

•

Warm weather can become under-inflated in 
colder weather.

•

Cold weather can become over-inflated in warmer 
weather.

The low tire pressure/TPMS indicator will not come 
on as a result of over inflation.

Low Tire 

Pressure/TPMS 

Indicator

447

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When Driving

u

Tire Pressure Monitoring System (TPMS)

Driving

To select the tire pressure monitor, set the 
power mode to ON, and press the 

 

(information) button until you see the tire 
pressure screen.

The pressure for each tire is displayed in psi 
(U.S.) or kPa (Canada).

Tire Pressures Low

 is displayed when a tire 

has significantly low pressure. The specific tire 
is displayed on the screen.

■

Tire Pressure Monitor

1

Tire Pressure Monitor

The pressure displayed on the multi-information 
display can be slightly different from the actual 
pressure as measured by a gauge. If there is a 
significant difference between the two values, or if 
the low tire pressure/TPMS indicator and the message 
on the multi-information display do not go off after 
you have inflated the tire to the specified pressure, 
have the system checked by a dealer.

Tire Pressure Monitor Problem

 may appear if you 

drive with the compact spare tire

*

, or there is a 

problem with the TPMS.

* Not available on all models

448

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When Driving

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Tire Pressure Monitoring System (TPMS) - Required Federal Explanation

Driving

Tire Pressure Monitoring System (TPMS) - Required 
Federal Explanation

Each tire, including the spare (if provided), should be checked 
monthly when cold and inflated to the inflation pressure 
recommended by the vehicle manufacturer on the vehicle placard 
or tire inflation pressure label.

(If your vehicle has tires of a different size than the size indicated 
on the vehicle placard or tire inflation pressure label, you should 
determine the proper tire inflation pressure for those tires.)

As an added safety feature, your vehicle has been equipped with 
a tire pressure monitoring system (TPMS) that illuminates a low 
tire pressure telltale 

when one or more of your tires is significantly under-inflated.

Accordingly, when the low tire pressure telltale illuminates, you 
should stop and check your tires as soon as possible, and inflate 
them to the proper pressure.

Driving on a significantly under-inflated tire causes the tire to 
overheat and can lead to tire failure. Under-inflation also reduces 
fuel efficiency and tire tread life, and may affect the vehicle's 
handling and stopping ability.

449

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When Driving

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Tire Pressure Monitoring System (TPMS) - Required Federal Explanation

Driving

Please note that the TPMS is not a substitute for proper tire 
maintenance, and it is the driver's responsibility to maintain 
correct tire pressure, even if under-inflation has not reached the 
level to trigger illumination of the TPMS low tire pressure telltale.

Your vehicle has also been equipped with a TPMS malfunction 
indicator to indicate when the system is not operating properly. 
The TPMS malfunction indicator is combined with the low tire 
pressure telltale. When the system detects a malfunction, the 
telltale will flash for approximately one minute and then remain 
continuously illuminated. This sequence will continue upon 
subsequent vehicle start-ups as long as the malfunction exists.

When the malfunction indicator is illuminated, the system may 
not be able to detect or signal low tire pressure as intended.

TPMS malfunctions may occur for a variety of reasons, including 
the installation of replacement or alternate tires or wheels on the 
vehicle that prevent the TPMS from functioning properly.

Always check the TPMS malfunction telltale after replacing one or 
more tires or wheels on your vehicle to ensure that the 
replacement or alternate tires and wheels allow the TPMS to 
continue to function properly.

450

Driving

AcuraWatch

TM

AcuraWatch

TM

 is a driver support system which employs the use of two distinctly 

different kinds of sensors: a radar sensor located behind the emblem and a front 
sensor camera mounted to the interior side of the windshield, behind the rearview 
mirror.

AcuraWatch

TM

 has following functions.

■

The functions which do not require button operations to activate

•

Collision Mitigation Braking System

TM

 (CMBS

TM

) 

2

 P. 453

•

Road Departure Mitigation (RDM) System  

2

 P. 488

■

The functions which require button operations to activate

•

Adaptive Cruise Control (ACC)  

2

 P. 463

•

Lane Keeping Assist System (LKAS) 

2

 P. 478

451

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AcuraWatch

TM

u

Continued

Driving

■

MAIN Button

Press to activate standby mode for ACC and 
LKAS. Or press to cancel these systems.

■

LKAS Button

Press to activate or cancel the LKAS.

■

RES/ACCEL / DECEL/SET Button

Press 

RES/ACCEL

 to resume the ACC or 

increase the vehicle speed.
Press 

DECEL/SET

 to set the ACC or decrease 

the vehicle speed.

■

Interval Button

Press the   (interval) button to change the 
ACC following-interval.

■

CANCEL Button

Press to cancel ACC.

■

Operation Buttons for the ACC/LKAS

MAIN

 Button

CANCEL

 Button

Interval 

Button

LKAS 

Button

RES/ACCEL

 / 

DECEL/SET

 Button

452

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AcuraWatch

TM

u

Driving

You can see the current state of ACC and 
LKAS.

■

Multi-Information Display Content

a

Indicates that ACC and LKAS are ready to 
be activated.

b

Indicates that LKAS is activated and 
whether or not traffic lane lines are 
detected.

c

Indicates whether or not a vehicle is 
detected ahead.

d

Shows the set vehicle speed.

e

Shows the set vehicle interval.

453

uu

AcuraWatch

TM

u

Collision Mitigation Braking System

TM

 (CMBS

TM

)

Continued

Driving

Collision Mitigation Braking System

TM

 (CMBS

TM

)

Can assist you when there is a possibility of your vehicle colliding with a vehicle or a 
pedestrian detected in front of yours. The CMBS

TM

 is designed to alert you when the 

potential for a collision is determined, as well as to reduce your vehicle speed to help 
minimize collision severity when a collision is deemed unavoidable.

■

How the system works

1

Collision Mitigation Braking System

TM

 (CMBS

TM

)

Important Safety Reminder

The CMBS

TM

 is designed to reduce the severity of an 

unavoidable collision. It does not prevent collisions 
nor stop the vehicle automatically. It is still your 
responsibility to operate the brake pedal and steering 
wheel appropriately according to the driving 
conditions.

The CMBS

TM

 may not activate or may not detect a 

vehicle in front of your vehicle under certain 
conditions:

2

CMBS

TM

 Conditions and Limitations

 P. 457

You can read about handling information for the 
camera equipped with this system.

2

Front Sensor Camera

 P. 493

For directions on the proper handling of the radar 
sensor, refer to the following page.

2

Radar Sensor

 P. 495

When the CMBS

TM

 activates, it may automatically 

apply the brake. It will be canceled when your vehicle 
stops or a potential collision is not determined.

The system starts monitoring the roadway ahead when your vehicle speed is about 

3 mph (5 km/h) and there is a vehicle in front of you.

The radar sensor is 

behind the emblem.

The CMBS

TM

 activates when:

●

The speed difference between your vehicle and a vehicle or pedestrian 
detected in front of you becomes about 3 mph (5 km/h) and over with a chance 
of a collision.

●

Your vehicle speed is about 62 mph (100 km/h) or less and there is a chance of a 
collision with an oncoming detected vehicle or a pedestrian in front of you.

The camera is 

located behind the 

rearview mirror.

When to use

uu

AcuraWatch

TM

u

Collision Mitigation Braking System

TM

 (CMBS

TM

)

454

Driving

■

When the system activates

You can change the distance (

Long

/

Normal

/

Short

) between vehicles at which the 

system’s earliest collision alert will come on through multi-information display or 
information screen setting options.

2

List of customizable options

 P. 102, 321

1

When the system activates

The camera in the CMBS

TM

 is also designed to detect 

pedestrians.
However, this pedestrian detection feature may not 
activate or may not detect a pedestrian in front of 
your vehicle under certain conditions.
Refer to the ones indicating the pedestrian detection 
limitations from the list.

2

CMBS

TM

 Conditions and Limitations

 P. 457

The system provides visual and audible alerts of a possible collision, and stops 

if the collision is avoided.

u

Take appropriate action to prevent a collision (apply the brakes, change 
lanes, etc.)

Beep

Visual Alerts

Audible Alert

455

uu

AcuraWatch

TM

u

Collision Mitigation Braking System

TM

 (CMBS

TM

)

Continued

Driving

The system has three alert stages for a possible collision. However, depending on circumstances, the CMBS

TM

 may not go through all of 

the stages before initiating the last stage.

■

Collision Alert Stages

Distance between vehicles

CMBS

TM

The sensors detect a vehicle

Audible & Visual WARNINGS

Braking

Stage 

one

There is a risk of a collision with the vehicle 
ahead of you.

When in 

Long

, visual and audible 

alerts come on at a longer distance 
from a vehicle ahead than in 

Normal

 setting, and in 

Short

, at a 

shorter distance than in 

Normal

.

—

Stage 

two

The risk of a collision has increased, time to 
respond is reduced.

Visual and audible alerts.

Lightly 

applied

Stage 

three 

The CMBS

TM

 determines that a collision is 

unavoidable.

Forcefully 

applied

Your Vehicle

Vehicle 
Ahead

Normal

Short

Long

Your 
Vehicle

Vehicle 
Ahead

Your 
Vehicle

Vehicle 
Ahead

uu

AcuraWatch

TM

u

Collision Mitigation Braking System

TM

 (CMBS

TM

)

456

Driving

Press and hold the button until the beeper 
sounds to switch the system on or off.

When the CMBS

TM

 is off:

•

The CMBS

TM

 indicator in the instrument 

panel comes on.

•

A message on the multi-information display 
reminds you that the system is off.

The CMBS

TM

 is turned on every time you start 

the engine, even if you turned it off the last 
time you drove the vehicle.

■

CMBS

TM

 On and Off

1

Collision Mitigation Braking System

TM

 (CMBS

TM

)

The CMBS

TM

 may automatically shut off, and the 

CMBS

TM

 indicator will come and stay on under certain 

conditions:

2

CMBS

TM

 Conditions and Limitations

 P. 457

Continued

457

uu

AcuraWatch

TM

u

Collision Mitigation Braking System

TM

 (CMBS

TM

)

Driving

The system may automatically shut off and the CMBS

TM

 indicator will come on under 

certain conditions. Some examples of these conditions are listed below. Other 
conditions may reduce some of the CMBS

TM

 functions.

2

Front Sensor Camera

 P. 493

2

Radar Sensor

 P. 495

■

Environmental conditions

•

Driving in bad weather (rain, fog, snow, etc.).

•

Sudden changes between light and dark, such as an entrance or exit of a tunnel.

•

There is little contrast between objects and the background.

•

Driving into low sunlight (e.g., at dawn or dusk).

•

Strong light is reflected onto the roadway.

•

Driving in the shadows of trees, buildings, etc.

•

Roadway objects or structures are misinterpreted as vehicles and pedestrians.

•

Reflections on the interior of the windshield.

•

Driving at night or in a dark condition such as a tunnel.

■

Roadway conditions

•

Driving on a snowy or wet roadway (obscured lane marking, vehicle tracks, 
reflected lights, road spray, high contrast).

•

Driving on curvy, winding, or undulating roads.

•

The road is hilly or the vehicle is approaching the crest of a hill.

■

CMBS

TM

 Conditions and Limitations

1

CMBS

TM

 Conditions and Limitations

Have your vehicle checked by a dealer if you find any 
unusual behavior of the system (e.g., the warning 
message appears too frequently).

458

uu

AcuraWatch

TM

u

Collision Mitigation Braking System

TM

 (CMBS

TM

)

Driving

■

Vehicle conditions

•

Headlight lenses are dirty or the headlights are not properly adjusted.

•

The outside of the windshield is blocked by dirt, mud, leaves, wet snow, etc.

•

The inside of the windshield is fogged.

•

An abnormal tire or wheel condition (wrong sized, varied size or construction, 
improperly inflated, compact spare tire

*

, etc.).

•

When tire chains are installed.

•

The vehicle is tilted due to a heavy load or suspension modifications.

•

The camera temperature gets too high.

•

Driving with the parking brake applied.

•

When the radar sensor behind the emblem gets dirty.

* Not available on all models

459

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AcuraWatch

TM

u

Collision Mitigation Braking System

TM

 (CMBS

TM

)

Continued

Driving

■

Detection limitations

•

A vehicle or pedestrian suddenly crosses in front of you.

•

The distance between your vehicle and the vehicle or pedestrian ahead of you is 
too short.

•

A vehicle cuts in front of you at a slow speed, and it brakes suddenly.

•

When you accelerate rapidly and approach the vehicle or pedestrian ahead of you 
at high speed.

•

The vehicle ahead of you is a motorcycle, bicycle, mobility scooter or other small 
vehicle.

•

When there are animals in front of your vehicle.

•

When you drive on a curved, winding or undulating road that makes it difficult for 
the sensor to properly detect a vehicle in front of you.

•

The speed difference between your vehicle and a vehicle or pedestrian in front of 
you is significantly large.

•

An oncoming vehicle suddenly comes in front of you.

•

Another vehicle suddenly comes in front of you at an intersection, etc.

•

Your vehicle abruptly crosses over in front of an oncoming vehicle.

•

When driving through a narrow iron bridge.

•

When the lead vehicle suddenly slows down.

460

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AcuraWatch

TM

u

Collision Mitigation Braking System

TM

 (CMBS

TM

)

Driving

Limitations applicable to pedestrian detection only

•

When there is a group of people in front of your vehicle walking together side by 
side.

•

Surrounding conditions or belongings of the pedestrian alter the pedestrian’s 
shape, preventing the system from recognizing that the person is a pedestrian.

•

When the pedestrian is shorter than about 3.3 feet (1 meter) or taller than about 
6.6 feet (2 meter) in height.

•

When a pedestrian blends in with the background.

•

When a pedestrian is bent over or squatting, or when their hands are raised or 
they are running.

•

When several pedestrians are walking ahead in a group.

•

When the camera cannot correctly identify that a pedestrian is present due to an 
unusual shape (holding luggage, body position, size).

■

Automatic shutoff

The CMBS

TM

 may automatically shut itself off and the CMBS

TM

 indicator comes and 

stays on when:

•

The temperature inside the system is high.

•

You drive off-road or on a mountain road, or curved and winding road for an 
extended period.

•

An abnormal tire condition is detected (wrong tire size, flat tire, etc.).

•

The camera behind the rearview mirror, or the area around the camera, including 
the windshield, gets dirty.

Once the conditions that caused the CMBS

TM

 to shut off improve or are addressed 

(e.g., cleaning), the system comes back on.

Continued

461

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AcuraWatch

TM

u

Collision Mitigation Braking System

TM

 (CMBS

TM

)

Driving

The CMBS

TM

 may activate even when you are aware of a vehicle ahead of you, or 

when there is no vehicle ahead. Some examples of this are:

■

When Passing

Your vehicle approaches another vehicle ahead of you and you change lanes to pass.

■

At an intersection

Your vehicle approaches or passes another vehicle that is making a left or right turn.

■

With Little Chance of a Collision

1

CMBS

TM

 Conditions and Limitations

For the CMBS

TM

 to work properly:

Always keep the radar sensor cover clean.

Never use chemical solvents or polishing powder for 
cleaning the sensor cover. Clean it with water or a 
mild detergent.

Do not put a sticker on the radar sensor cover or 
replace the radar sensor cover.